Lintel construction.



Patented AprilA 1 1, 1905.

PATENT OFFICE.

. JUL-IUS KAHN, OF'DE'IROIT, MICHIGAN.

LINTEL CONSTRUCTION.

SPECIFICATION fOImng part Of 'Letters Patent NO. 786,820, dated. .April11, 1905. Application filed December 2l, 15903. Serial No. 186,146.

To all whom t may concern.'

Be it known that I, JULIUs KAHN, a citizen of the United States,residing at Detroit, in the county of Wayne and State of Michigan, haveinvented certain new and useful Improvements in Lintel Construction, ofwhich the following is a specification.

This invention relates to lintels to be used over window, door, andother openings, and pertains especially to a trussed form ofconstruction by means of which a relatively small amount of metal, inconnection with concrete or other cementitious substance, is made topossess great sustaining power. This general trussed construction ofsteel and. concrete I have embodied in Letters Patent No. 736,602,heretofore granted to me, and in subsequent applications.

A further object of this inventionis to provide a lintel which can, becheaply and easily manufactured and be readily erected into place in thebuilding.

The gist of the invention consists of a main longitudinally-disposedmetal portion of such shape, preferably iiattened, upon the edges ofwhich the wall can be supported, and one or more upwardly-extending armssecured to the main portion and embedded in a body material of concrete,which forms the compression member of a trussed beam.

In the annexed drawings, illustrating this invention and constituting apart of this speciiication. Figure 1 is a front elevation of myinvention, showing the edge of the flattened metal plate and the arms inoutline. Fig. 2 is an end View of the same and shows the concrete bodymaterial between the brick or block wall construction. Figs. 3 and 4 areperspective views of the metal member diiferently constructed inaccordance with my invention. Figs. 5 and 6 show a modified form inwhich an auxiliary arm is employed. Figs. 7, 8, 9, and 10 represent theuse of the metal member in connectionwith various building material.Figs. l1 and 12 show a modiied form of connecting the arm members to themain flattened plate. Figs. 13 and 14 show still different constructionof the metal member. Fig. 15 shows the application to curved or archedlintels, while Fig. 16 is a perspective View of a general form of mylintel. f

Similar letters refer to like parts throughout the dilferent views.

a is the main longitudinally-disposed metal member, preferably fiat,though it lmay be otherwise shaped, except that along the sides it isrequired to have suflcient horizontal surface to receive the wall c.Secured to this main portion a are theupwardly-extending arms which maybe varied in number, size, length, and position. These arms arepreferably inclned obliquely outward from the middle of the main plate,but may be perpendicular thereto without departing from the intendedscope of my invention. They may be of uniform lengths and make uniformangles with the bottom plate or may be of different lengths and bedifferently inclined.

in Fig- 5 is an auxiliary arm secured near the middle of the plate andextending outward over the points of support designated by o.

The arms may be struck up from the plate a, as shown in Fig. 3, or maybe secured thereto by riveting or similar means, as represented in Fig.4. Other means may be employed of securing the arms to the plate, thegist of the invention being to. provide a direct and positiveattachment, so that the stresses developed in the arms will betransmitted to the main longitudinal portion.

d is a body material of concrete or other cementitious material andembeds and adheres to the arms b and 7L and forms the compressionportion of the completed truss or lintel.

As shown in Fig. 11, the rods forming the arms have a central portion z'in the same plane as the plate a and pass through it at the points m.The advantage of this form of construction is the obtaining ofadditional metal at the middle section of the lintel.

InA Figs. 13 and 14 the arms b are represented hooked and countersunk inthe plate a at the points a. Still other means .of construction may beemployed without departing from my invention, which I claim and desireto secure, broadly, as covering alintel construction liavinga main orbottom portion so shaped as to carry a part of the wall and forming thetension member of a trussed beam, the remainder of the beam being` madeup of the arms attached to the bottom plate and the cementitiousmaterial embedding them.

In erection the metal lintel, as shown in Fig. 16 or in differentmodiiication, is placed in position upon the end supports o and held byordinary centering. The facing of brick or blocks, indicated by c, isthen built up in the same manner as the remainder of the Wall, afterwhich the central and back portions are filled in either entirely ofconcrete or with that material embedding the arms, and the inner surfaceof the wall made up of masonry.

What I claim, and desire to secure by Letters Patent, is-

l. In a lintel construction, the combination with a metallic part-trussconsisting of a main longitudinally-disposed member and one or moreupwardly-extending arms directly attached thereto, of a cementitiousbody material embedding said arms but allowing the edges of the mainmember to project beyond said body material, of one or more blocks ofterra-cotta or similar material disposed upon the projecting edges ofthe metallic member and supported thereby, substantially as described.

2. In a lintel construction, the combination of a metallic part-trussconsisting of a main longitudinally-disposed portion, of a plurality ofupwardly-extending arms attached to the main portion at pointsintermediate its ends, of an auxiliary arm secured to the main portionat or near the middle and extending upward and outward from said middlepoint, the principal and auxiliary arms embedded in a cementitious bodymaterial to form a trussed beam, the edges of the main longitudinalmember projecting beyond the cementitious body material to support afacing of brick, terracotta, or similar material, substantially asdcscribed.

3. In a lintel construction, the combination with alongitudinally-disposed flattened plate, of one or moreupwardly-extending arms directly secured to said plate, of cementitiousbody material embedding said arms and forming the compression member ot'a trussed beam, the front or outer edge of said plate projecting beyondthe body material, and a firmingl oi brick, terra-cotta or the likeresting upon said projecting edge, substantially as described.

4. In a composite building construction, a metal tension membercomprising main and auxiliary tension members, a cementitious bodymolded upon the main and around thel auxiliary tension members, and afacing\ 'all resting upon the main metal member and against thecementitious body.

5. In acomposite building construction, the combination of a fiatlongitudinal metal tension member, auxiliary tension members securedthereto, a cementitious compression member molded upon the iat memberand around the auxiliary members, and a facingwall of other buildingmaterial resting upon the flat metal member and against the cementitiousmember. h

In testimony whereol I have signed my name to this speciiication in thepresence of two subscribing witnesses.

JULIUS KANN.

Witnesses:

R. N. DYAR, A. M. GREGORY.

